43 KB429 KB23 KB199920252007Karabay, Hasanletnik:538 straništevilka:9str. 548-555ISSN:0039-2480COBISSID:10274075URN:URN:NBN:SI:doc-W6LJREH8enAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikizgubeoptimiranjetoplovodni sistemiToplotno-gospodarsko optimiranje toplovodnega sistema| parametrična raziskava vpliva pogojev sistema| study of the effect of the system conditions| The thermo-economic optimization of hot-water piping systems|A thermo-economic optimization method for a hot-water distribution pipe is presented. The method is based on the second law of thermodynamics. Both theoptimum pipe diameter and the insulation thickness are determined simultaneously, considering exergy destruction due to friction and exergy lossdue to heat losses as the operation cost, while the piping and insulation costs are considered as an investment. The effect of mass flow rate, annual operation time, depreciation period and water temperature on the optimum pipe diameter and insulation thickness are presented with a parametric investigation. The results show that the mass flow rate dominates the optimum pipe diameter. The annual operation time, depreciation period and water temperature are the decision parameters for the optimum insulation thicknessV prispevku smo predstavili toplotno-gospodarsko metodo optimiranja toplovodnega sistema. Metoda temelji na drugem zakonu termodinamike. Sočasno, ob upoštevanju eksergijske razgradnje zaradi trenja in eksergijske izgube zaradi toplotnih izgub in stroškov delovanja, smo določili optimalni premer cevi in debelino izolacije, medtem ko smo stroške cevovoda in izolacije obravnavali kot investicijo. S parametrično raziskavo smo predstavili vpliv masnega pretoka, letni čas obratovanja, amortizacijsko dobo ter temperaturo vode. Rezultati kažejo, da na optimalni premer cevi najbolj vpliva masni pretok. Letni čas obratovanja, amortizacijska doba in temperatura vode so odločilni vplivi pri izbiri primerne debeline izolacijeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo